CN2074259U

CN2074259U - Self-rectification pulse controlling device for trolley locomotive

Info

Publication number: CN2074259U
Application number: CN 90206191
Authority: CN
Inventors: 刘洛夫
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-05-10
Filing date: 1990-05-10
Publication date: 1991-04-03

Abstract

The utility model provides a self-rectification pulse controlling device for trolley locomotives, which is used for light-rail electric trolley locomotives, or urban tramcars, or urban trolley cars in mining. The utility model is composed of a power transformer (1) for a substation. As current collector (3) for trolley locomotives, a silicon-controlled voltage-regulating rectification circuit, and a controlling circuit. Rectification equipment of the substation and inverter equipment are saved by the self-rectification pulse controlling device for the trolley locomotives, the problem that the conversion of a pulse controlling device isn't reliable is eliminated, and the operational reliability of the locomotives is ensured. The utility model has the advantages of simple structure, light weight, low cost, convenient use of the power.

Description

Self-rectification pulse controlling device for trolley locomotive

A kind of mining light rail trolley locomotive or city railroad, trackless trolley car belong to the power supply and the control of locomotive with trolley locomotive self-rectifying pulse regulation device.

The rail in existing mining light rail trolley locomotive and city, the electricity consumption of trackless trolley car are to transfer to required voltage by source of AC through rectifier transformer, and be whole for behind the direct current through rectifying installation again, imports the traction networking of locomotive.The starting of locomotive and speed governing have two kinds of methods (" mine rail transportation ", " mine transportation and lifting means "---coal industry press).First kind is the convert resistance method, and it is the resistance conversion that utilizes serial resistance in the armature circuit, changes the terminal voltage of traction electric machine, finishes control starting or speed governing, and this method is reliable, is present domestic employed main method.Second kind is silicon control chopper speed control method, it is by obtaining direct supply in the traction networking by the electric locomotive current collector, utilize to regulate to be connected on the aviation value that silicon controlled make-and-break time and number of times in the traction motor loop change the traction motor terminal voltage, reach the speed governing purpose.Silicon control chopper speed control method is than convert resistance method power saving 30%, and be the low speed starting, quicken evenly, travel steadily, realized the contact pointless speed governing, moment of starting is big, average current is little, voltage fluctuation is lower, the volume of equipment is little, and is in light weight.This method is also not penetration and promotion at present.

Convert resistance method and silicon control chopper speed control method all have certain problem: the power consumption of convert resistance method resistance in starting and speed regulation process is very big, during low speed driving, traction motor is almost completely worked under the condition of series resistance, and the reactive power consumption of resistance accounts for 30% of total electricity consumption; In addition, piecemeal convert resistance in the speed regulation process can not reach the smoothly adjustable-speed purpose; And the big heaviness of control convenience body of this method, the operation effort, cost is also high.Silicon control chopper speed control method is except the cost height, and subject matter is poor reliability, because present all uses is DC supply, its silicon controlled turn-offs and finishes by converter circuit, be in operation, it is shorter closing time silicon control to occur, and converting capacitor has little time sufficient voltage; Or the different logical overlong time of silicon control, electric charge sufficient on the converting capacitor will bleed off by silicon control, diode.Both of these case all can cause commutation failure and cause that the electric current in the locomotive circuit changes suddenly, make the silicon control of conducting can not failure-free turn-off, the voltage at traction networking will whole suddenly making be added in the traction motor two ends, make operating locomotive full speed driving suddenly, cause accident, this is the major reason that present this method does not obtain popularizing.In addition, the electricity consumption of the bright photograph of present domestic trolley locomotive, siren, carrier current telephony etc. also has problem: they mostly are with 12V or 24V direct supply, and traction networking voltage is generally higher, reduce to 12V or the 24V low-voltage dc power supply is pretty troublesome from high-voltage DC power supply, the present dc inversion circuit that adopts is complex circuit, cost height not only, therefore and withdraw from use and maintenance capacity is very big, makes many locomotives.

In order to address the above problem, ad hoc meter comes from the commutating pulse regulation device.

Trolley locomotive self-rectifying pulse regulation device (Fig. 1), by substation transformer (1), trolley locomotive current collector (3), silicon-controlled voltage regulation rectifying circuit and control circuit are formed.During this device work, at first access the source of AC of locomotive required voltage by substation transformer (1), input traction networking (2), introduce source of AC, be divided into two-way by current collector (3) through air switch (4), one the tunnel for power circuit (Fig. 1), and one the tunnel for control circuit (Fig. 2) and lighting circuit (Fig. 1) etc.In power circuit, source of AC is rectified into direct supply through diode (10,11,12,13), supply with traction motor (20), be connected on the conduction angle of the controllable silicon SCR (30) in the traction motor loop by control circuit (Fig. 2) adjustment, thereby adjust the terminal voltage of traction motor (20), reach the purpose of speed governing, when switch (31) was closed, locomotive reached full speed running.On power circuit, flywheel diode (24) is housed, transistorized rc protection circuit is by resistance R ₁(15), R ₂(17), R ₃(23), R ₄(28) and capacitor C ₁(14), C ₂(16), C ₃(27), C ₄(29) form, adjust commutation node K ₁(18), K ₂(19), K ₃(25), K ₄(26) can change turning to of electrical motor, by circuit-closing contacts K ₅(22) and adjust resistance R ₆(21) resistance just can be adjusted the retro-speed of electric locomotive.

The control circuit electricity consumption is 80 volts of source of ACs, is obtained by voltage transformer (5), and is whole for behind the direct current through rectifier (32), and supply unijunction transistor binary pair carries out work by trigger circuit control controllable silicon SCR (30).Illumination can be obtained by voltage transformer (5) with 12V or 24V power supply, directly uses.Siren, carrier current telephony electricity consumption can be to use behind the direct current by rectifier (8) rectification, and be simple more than inverter.

Compare with silicon control chopper speed control method with existing convert resistance method, trolley locomotive self-rectifying pulse regulation device has saved the rectifying installation of substation and the contravariant equipment on the electric locomotive, kept the silicon control pulse to adjust the advantage of method than convert resistance method power saving 30%, owing to adopted Alternating Current Power Supply, silicon control in the control circuit can turn-off when the power supply zero crossing voluntarily, do not need to design converter circuit, eliminate the unreliable problem of the change of current of silicon control chopper speed control method, guaranteed the serviceability of locomotive.Whole device has that equipment is simple, light, rapid operation, cost are low, power supply take characteristics such as convenient.

Description of drawings:

Fig. 1 is the power circuit scheme drawing of trolley locomotive self-rectifying pulse regulation device, wherein 1 is voltage transformer, the 2nd, trolley locomotive traction networking, the 3rd, the electric locomotive current collector, the 4th, air switch, the 5th, voltage transformer, the 6th, control circuit, the 7th, the electric consumption on lighting device, the 8th, rectifier, the 9th, siren circuit, the 10,11,12, the 13rd, diode, 14, the 16,27, the 29th, electric capacity, 15, the 17,21,23, the 28th, resistance, the 18,19,22,25,26, the 31st, switch, the 20th, traction motor, the 24th, flywheel diode, the 30th, controllable silicon SCR.

Fig. 2 is the control circuit scheme drawing of trolley locomotive self-rectifying pulse regulation device.Wherein 32 is rectifiers, the 33rd, and the contact that control circuit links to each other with the trigger electrode of controllable silicon SCR (30).

Claims

1, the trolley locomotive self-rectifying pulse regulation device used of a kind of mining light rail trolley locomotive or city railroad or trackless trolley car, this device is by substation's supply transformer (1), trolley locomotive current collector (3), silicon-controlled voltage regulation rectifying circuit and control circuit are formed, and it is characterized in that drawing networking introducing power supply is source of AC; An end that is installed in the silicon-controlled voltage regulation rectifying device on the electric locomotive is connected with the traction networking, directly accepts source of AC, and the other end is connected in the work loop of DC traction motor, and traction motor is supplied with in the output DC source; In the supply line to illumination, siren, carrier current telephony etc. AC transformer is installed.